code: def test_pickle_pmap_sharding(self):
      ss = pxla.ShardingSpec(
          sharding=(pxla.Unstacked(8),),
          mesh_mapping=(pxla.ShardedAxis(0),),
      )
      s = jax.sharding.PmapSharding(jax.devices(), ss)
      self.assertEqual(s, pickle.loads(pickle.dumps(s)))
  
imports: import pickle
  import unittest
  from absl.testing import absltest
  from absl.testing import parameterized
  import jax
  from jax import numpy
  from jax import config
  from jax.interpreters import pxla
  from jax._src import test_util
  from jax._src.lib import xla_client
  import numpy
label_desc: Use image node_id 10 for calling the PickleTest obj's underlying member method code with example usage: obj.test_pickle_pmap_sharding() without return types